<!DOCTYPE html>
<html lang="en">
<title>HTMLselectElement Test: required attribute</title>
<link rel="author" title="Ionel Popescu" href="mailto:iopopesc@microsoft.com">
<script src="../../../../resources/testharness.js"></script>
<script src="../../../../resources/testharnessreport.js"></script>

<style>
  select:required {
    border: 3px dashed rgb(255, 0, 0);
  }

  select:optional {
    border: 1px solid rgb(128, 128, 128);
  }

  select, ::picker(select) {
    appearance: base-select;
  }
</style>

<select id="select0" required>
  <option>one</option>
  <option>two</option>
  <option>three</option>
</select>

<select id="select1">
  <option>one</option>
  <option>two</option>
  <option>three</option>
</select>

<select id="select2">
  <option>one</option>
  <option>two</option>
  <option>three</option>
</select>

<script>
function checkRequired(style) {
  assert_equals(style.borderWidth, '3px');
  assert_equals(style.borderStyle, 'dashed');
  assert_equals(style.borderColor, 'rgb(255, 0, 0)');
}

function checkOptional(style) {
  assert_equals(style.borderWidth, '1px');
  assert_equals(style.borderStyle, 'solid');
  assert_equals(style.borderColor, 'rgb(128, 128, 128)');
}

test(() => {
  const select0 = document.getElementById("select0");
  const select1 = document.getElementById("select1");
  const select2 = document.getElementById("select2");

  checkRequired(window.getComputedStyle(select0));
  checkOptional(window.getComputedStyle(select1));
  checkOptional(window.getComputedStyle(select2));
  select2.required = true;
  checkRequired(window.getComputedStyle(select2));
}, "Test required attribute");

</script>
